层状硼酸铍H_2BeB_4O_8的合成与结构

Synthesis and Crystal Structure of Layered Beryllium Polyborate H_2BeB_4O_8

在硼酸介质中合成了一种新的具有层状结构的多硼酸铍H2BeB4O8,并利用多晶X射线衍射方法确定了晶体结构。H2BeB4O8的空间群为P21/n,晶胞参数a=17.7564(2)?,b=4.2948(1)?,c=7.1532(1)?,β=96.8797(9)°。H2BeB4O8的层状结构由双三元环犤BeB4O11犦构成,层之间通过垂直于层平面的羟基所形成的氢键连接成三维结构。

A new layered beryllium polyborate H2BeB4O8 was synthesized in molten boric ac id flux. It crystallizes in the monoclinic space group P21/n with lattice consta nts a=17.75640(15)?, b=4.2948(1)?, c=7.1532(1)?, a=96.8797(9)-ray diffraction techniq ues, is composed of double three-membered ring unit [BeB4O11], which is further connected by corner-sharing to form two-dimensional layers. The two-dimensio nal layers are stacked along [100] direction and form three-dimensional structu re via hydrogen bonding. CCDC: 181925.